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scripts: Commands warn when passed zero arguments.

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This is a followup to 3f8326237d.

* guix/scripts/archive.scm (export-from-store): Warn then FILES is
empty.
* guix/scripts/build.scm (guix-build): Likewise.
* guix/scripts/copy.scm (warn-if-empty): New procedure.
(send-to-remote-host, retrieve-from-remote-host): Call it.
* guix/scripts/edit.scm (guix-edit): Warn when SPECS is empty.
* guix/scripts/environment.scm (guix-environment): Warn when MANIFEST
has zero entries.
* guix/scripts/graph.scm (guix-graph): Warn then ITEMS is empty.
* guix/scripts/package.scm (process-actions): Warn when FILES and TRANS
are both empty.
This commit is contained in:
Ludovic Courtès 2021-05-28 10:53:49 +02:00
parent 7243a8c7ec
commit 681af1fb78
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7 changed files with 27 additions and 3 deletions
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guix/scripts/environment.scm
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@ -755,6 +755,9 @@ message if any test fails."
(> (length (manifest-entries manifest-from-opts)) 0))
(leave (G_ "'--profile' cannot be used with package options~%")))
(when (null? (manifest-entries manifest))
(warning (G_ "no packages specified; creating an empty environment~%")))
(set-build-options-from-command-line store opts)
;; Use the bootstrap Guile when requested.